Re: good gaming comp?
RAID Level 0 and Level 5 (there are like 10 RAID levels but we don't care about the other ones) deals with performance gains from file transfer, but mainly Level 0 is most simple. It requires two hard drives of the same size (preferably) and same interface (SATA). Basically, data is broken down into chunks that are spread out across two or more hard drives which result in nearly twice the data access speed. However, if one hard drive fails, the other one does too. Think of it like one hard drive, but you are actually using two.
RAID was primarily used for redundancy for disk mirroring (backup). If one fails, the other drive has the exact data backed up already. RAID level 0 does not have fault tolerance which is why the most popular RAID setup is Level 5 in which you get performance and fault tolerance at the same time
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?